Officials are probing how a 51-year-old highway bridge came to collapse in the Italian port city of Genoa yesterday, killing at least 26 people and injuring 16 others as it sent dozens of vehicles tumbling into a heap of concrete and twisted steel.

Consider pay cut, PM tells Aust Post boss

Malcolm Turnbull is calling on the managing director of Australia Post to take a voluntary pay cut.

The prime minister is critical of the $4.4 million salary and a $1.2 million bonus Ahmed Fahour was paid last year, labelling it part of a "cult of excessive executive CEO remuneration".

"I think Ahmed should step back and say 'you know, here in 2017, in an economy where a lot of people are doing it pretty hard, where budgets are tight, this is too much to be paid as CEO of a government-owned postal company'," he told 3AW's Neil Mitchell on Friday.

Mr Turnbull said he retained confidence in the company's board - which sets executive pay - but the managing director's package is far too high.

He acknowledged Mr Fahour was very talented but $5.6 million was too much.

Mr Fahour's pay packet was revealed by a parliamentary committee after Australia Post tried to keep it confidential.

Documents show another five unnamed executives earned between $1.8 million and $1.3 million.